Electrical appliance



Sep-t. 22, 1931. L E, HENDEE ELECTRICAL APPLIANCE Filed June 18, 1926 Patented Sept. 22, 1931 lUNI-T131) STATES PATENT OFFICE Lann HENDEE, ori-MILWAUKEE, WISCONSIN, AssIGNon, BY MEsNE ASSIGNMENTS, r TO LINE MATmaar,y COMPANY, or soUT-H MILWAUKEE, wIscoNsIN, A CORPORATION or DELAWARE `Application filed June 18,

` This invention relates to certain new and useful improvements 4in electrical appliances andhas as a primary object the provision of an improved 'insulating coupling for operat- V5, ing rods or shafts such as employed for the operation of oil switches andthe like.

Whereoil switches or other devices designed to carry large loads are operated manually, it is highly desirablethat every 10 possible safeguard vbe vprovided to protect the operator against electrocutionv in theevent the operating rod or shaft becomes included in the circuit and to this end this invention has. as va further Vobject they provision of im- '15 proved means adapted to be incorporated within an operating rod or shaft to thoroughly insulate one portion thereof from the other.

In an insulating` coupling of the character 126 described it is of utmost importance that the same be of high mechanical strength and subject to as little variation as possible in either tension or compression due to sudden loads and to this end it is a further object 3 the same is incorporated is no weaker at the insulating point than at any other point.

A still further object of this invention resides in the provision of a coupling of the character described which is so designed as to be capable of economical manufacture.

With the above and other objects in view which will appear as'the description proceeds, my invention resides in the novel construction, combination and arrangement of parts substantially as hereinafter described and more particularly defined by the appended claims, it being understood that such changes in the precise embodiment of the herein-disclosed invention may be made as come within the scope of the claims,

In the accompanying drawings, I have illustra-ted one complete example of the physical embodiment of my invention constructed according to the best mode I'have so far c ELECTRICAL APPLIANCE 1926. Serial No. 116,850.

devised for the practical application of the principles thereof, and in which:

Figure 1 is a perspective view of a portion of a shaft or rod having my improved insulator coupling incorporated therein;

Figure 2 is a transverse sectional View taken through my improved coupling on the plane of the line 2-2 of Figure 3;

Figure 3 is a transverse sectional view taken through Figure 1 on the plane of the line 3 3, and

Figure 4 is a'perspective view of the sectional insulating member apart from the rod and coupling.

Referring now more particularly to the accompanying drawings, in which like numerals designate like parts throughout the several views, thenumerals and 6 designate two sections ofan operating rod or shaft adapted to be joined by my improved insulating couplingj?. vThe coupling consists of two complementary metallic members 8 suitably secured'to the shaft sections 6, as at 8,'an'd each having a pair of diametrically opposed fingers or elongated lugs 9 projected from their ends to receive an insulator therebetween. f

The insulator is made in three parts'or sections 10, 11 and 12, the sections 1() and 12 being identical in construction and of a diameter equal to the outside diameter of the members 8 and having two diametrically opposed recesses 13 in their peripheries of a depth and width to conform to the depth and width of the fingers 9. The member 11 is likewise. of

a diameter equal tothe outside diameter of 'Q the members 8 and has four equal-spaced slots or recesses 14 in its outer surface of a depth and width equal to that of the fingers 9 to receive the same, the length of the member 11 being equal to the length of the fingers 9 less the thickness ofone end insulating piece so that with the sectional insulating member inplace the assembly will be as illustrated in Figure 1, with the fingers'9 of one member' 8 spaced from the other member 8 a distance eouafl to the thickness of an end insulating piece and lspaced from the finger 9 of the other member 8 the distance between adjacent recesses or slots 14 of the insulating piece .11.

Y those otgtheother-to insure tions, for otherwise the ormatonof Kthe slotsv or recesses 14 of the central portion 'll out oit' alignment with :the endillies would require l delicato maolinf-ng and @consequently in-volare 'longitudinal stress may an inoreasod oostY Making tho insulating member of l three pieces permits the quick and Cheap formationio the recesses v13 and 14C .by means of anfautomatic yscrew machine.V

Goin the foregoing description taken in connection with the :accompanyingdnaavings it will ghe ,readilyapparent to those Skilled in the artto which an innention kof .this @har-aoter appertains that'rl have provided an proved lcoupling wherein ythe ,insulator .-al-

Ways ,main-tained 4under compression tv :hich is very desirable Where insulating niaterial `of .tgv-po iis-boing used., one .which boof inomeased strength anden@ Wliiohwillreadily lend itself ,to .proffl-lrlotion Yby reason .of its sionstnnotion Y Y a What I elaimas .my invention is;

.1- A-n appl-ian@ fof; theY Character da scribed, :comprising a nan' of .coupling niembers ha-ying spaced lingers extended Vlf-.110,111 adjaoentondaan insulating memborfongagod by the endsfof thereonpllng members adapted to loo ,oom-mosse@.therebetween and having SPaoaol molasses Y'to neoene said fingers, the

Vopposite ends `of the recesses being .closed -to plyonide a hed of ,insulatingrnateriagl between the .of 'oaoh linger and-the adiaoant naar pling ,member and ineans :securing .Said

ting-ers to the' insnlatng member, whereby be applied to theoon- Pling'vmolnlaors :inieither direction. i

appflianoe of the oharaoter .do-

vSoi-loeel, pair of Coupling rrnembors, ola-V ,Inetrioally opposed ngers projecting from the ien-ds of the coupling members., a naif of insulating members .of iaishape @rosaseetion approximately s thatl of the -conpling members erossesectfion and hawing recesses in their peripheries,toreceiwe .said lingers, one insulating member being confined between .the ingers oit Yeach lcoupling member and abutting z the end ,odi each coupling 'meinbei', a third insulating member Aof :a k cross- Sectlon complementary :to that of the other thevends of the coupling members, a pair of insulating members of a shape in cross-section approximately that of the coupling members in cross-section andhavi-ng recesses in their peripheries to receive said lingers, one insulating member being confined between the inge'rsof each coupling member and abutting the end ofea'ch coupling member, a third insulating ,memberlof -a .orossesectioncomplementary to thatoftheother insulating members ,and .having ,equi-spaced longitudinal recesses in its periphery `ofa depth and Width to receive said Ifingers, said third insulating member being o f. a length .substantially ,equal togthedistan'ce the vliijlgers project beyond :the first insulating members, -and fastening means connecting-the lingers:ofeaeheoupling through .the @third-mentioned insulating member,-the fastening means ,of one coupling member being wstaggered with respect to the fastening means .ofthe other.

,Intestimony wheneof l afx my signature.

- LEM HENDEE- insulating members and having cequi-spaced longitudinal recesses in Vits periphery voff :a Acflelpth:and Width to receiveesaid fingers, said thirdV insulating member being of a length aio 

